Indictment comes almost a month after a jury found Amanda Hayes' husband Grant guilty of first-degree murder

October 8, 2013 2:42:28 PM PDT

RALEIGH, N.C. --

A Wake County grand jury has issued a new indictment that adds an "accessory after the fact of murder" charge against Grant Hayes' wife, Amanda.

It comes almost a month after eight women and four men found Grant Hayes guilty of first-degree murder in the killing and dismemberment of Laura Ackerson - who was the mother of his two oldest children.

Hayes - aka Grant Haze - was charged - along with Amanda - with murdering the 27-year-old at their Raleigh apartment in July, 2011 during a long-running custody dispute. Prosecutors say they chopped up Ackerson's body, put it in coolers, and then drove them in a rented U-Haul to Amanda Hayes' sister's house in Richmond, Texas, where the body parts were dumped in a nearby creek.

Hayes and his wife are being tried separately. Prosecutors are not seeking the death penalty. Amanda Hayes is expected to go on trial next year.